Cognomen 瑜晶 (瑜晶 
) , around the world, is a very rare family name. The surname 瑜晶 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 瑜晶 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 瑜晶 | China |